The world's longest highway tunnel on November 20, 2024.——The exit of Tianshan Shengli Tunnel is 12800 meters deep.。It is the world's first new pressure injection method independently developed by Zhongjiao Tianhe.（TBM）Hard rock tunnel Boring Machine“Victory”，At this time, it has successfully completed the excavation task.，Wait here with it“Twins”、35 meters from the surface.“Tianshan”，At that time, the pilot tunnel in the tunnel will be smoothly connected.。52 months of waiting for this moment.，This is a long time can not forget.、A moment of great excitement，The story behind it is hard.、There are tears、There is joy……
Want to work on porcelain There must be diamond.
The average elevation of Tianshan Shengli Tunnel is 3200 meters.，With four high, one more and one special（High ground stress、High and cold、High seismic intensity、High altitude、Multiple fault zones、Specialty）The characteristics of，It is an extra-long, cold and high-altitude highway tunnel.。TBMLarge fault fracture zone was encountered during excavation.、Large deformation of soft rock、Rock burst、Inrush of mud and water、High ground stress and other worldwide problems。The seismic intensity of the tunnel site isⅧDegree、The maximum inflow is about cubic metres 29000./God，High-pressure water inrush pressure up to 4 MPa（Pressure force equivalent to 400 meters of water depth）。Harsh natural environment and complex geological conditions，Conventional mine method and single open typeTBMThe construction methods are difficult to meet the tunneling requirements.。If conventional drilling and blasting methods are used，It will take about 12 years to complete the Tianshan Shengli Tunnel.。
Porcelain lives here.，Diamond has to keep up.。In order to successfully excavate Tianshan Shengli Tunnel，For the first time in the world, the company is innovative and open.TBMTunneling machine and pressure casting concrete method，Make“Tianshan”“Victory”At the same time, it has two tunneling modes and three support modes.，That is：Open tunneling method shall be adopted for better surrounding rock condition（TSA）Pattern；Yeah, the fracture zone、Weak surrounding rock、The rockburst stratum is supported by single shield steel formwork injection concrete.（TE）Pattern；Antipodal fracture zone、Large deformation of soft rock、Single shield steel segment is used to support tunneling in strong rock burst strata（TS）Pattern，To avoid the safety risk of collapse to operators and engineering equipment.，Ensure large deformation、Strong rock burst、Safety under complex strata such as multiple fault zones、Environmental protection、Excavate efficiently。“Victory”“Tianshan”Excavation diameter 8.43 meters、The total length is 282 meters、Weight about 2000 tons，Localization rate 98%Above，It is the most critical equipment for the construction of Tianshan Victory Tunnel.。
According to the equipment using unit——Expert of Tianshan Shengli Tunnel Project of CCCC Second Highway Engineering Co., Ltd.、Adviser、Senior engineer Cao Gang introduced.，“Victory”It is the most complete function I have seen in more than 30 years of contacting and engaging in tunnel construction.、The most automatedTBMRoadheader，In addition to the traditional open type,TBMIn addition to all functions，Encounter large fault fracture zone、Large deformation of soft rock and other worldwide problems，Just switch to another tunneling mode.，Can realize that safety unde a plurality of complex stratum、Environmental protection、Fast、Efficient tunneling。The construction site of the pressure injection method also has the advantages of no need of mixed spraying,、No need for slag removal，The construction environment is good，High degree of mechanization，And that support workload is small，Has the advantages of low labor intensity, good forming primary lining quality and the like.。“Victory”Up to 35 meters per day、Monthly excavation up to 528 meters，Creates high altitudes.、A New Record of Tunneling in High Ground Stress Environment。
At present，“Victory”“Tianshan”It has been invented、There are more than 20 utility model patents.，Appraised by China Machinery Industry Federation，The construction method of pressure casting concrete has reached the international advanced level.，Among them, the technology of pressure casting concrete support、Dual modeTBMThe equipment technology has reached the international leading level.。
With the advanced tunneling artifact Talent is also the key.
Four years ago，They come here from different places.，Set upTBMService technical team。This is an elite team.。Their average age is 37.。Among，TBM41 technicians，5 persons with bachelor degree or above，College degree or above 11 people。“TBMThe requirements for geological structure are relatively high.，More suitable for hard rock。Different from the traditional drilling and blasting method，TBMWork more efficiently、Quality、Safe、Environmental protection，More suitable。”Deputy project manager Zhang Yan said.。Since the commencement of construction，They aim at the geological structure construction characteristics of Shengli Tunnel.，A series of practical measures have been taken.。With the continuous study of engineers and technicians,，Use the matchingTBMStepping mechanism，Laying of door-type inverted arch blocks while stepping，Quickly step to the originating position，ForTBMThe early completion of the interval has laid a solid foundation.，Be highly praised by the owner。December 6, 2021，TBMPass throughVGrade I surrounding rock fracture zone，The rock formation is soft and rich in water.， Cause TBMThe cutter head is stuck and cannot rotate.。In order to get out of trouble as soon as possible，Company Project Service Team and Construction、Supervision and consultation with many well-known experts in China，Find out the cause of the jam，Formulate practical and feasible plans for extricating oneself from difficulties。Through 24 days and nights of non-stop work by all the staff，December 30, 2021, 15:26，Finally, he succeeded in extricating himself from difficulties.，It has laid a solid foundation for the subsequent construction to cross the unfavorable geological zone.，High ground stress at home and abroad、High and cold、High seismic intensity、High altitude、Multiple fault zones、Extra Long TunnelTBMThe construction has accumulated valuable experience.。
To hone professional skills with the spirit of craftsmen
In order to cultivate moreTBMTechnical talents，Through“Mentors and apprentices”Activity，FromTBMSkilled in the selected business in the team、Experienced technical backbones，Teach by example、Lead by example，Play pass、Help、The role of the belt，Take the project leader as the group leader and teach personally.，Make“Mentors and apprentices”Form a strong organizational guarantee。At the same time，To ensure that each student has a mentor.，The project department has also formulated practical teaching contents.、Objectives and Learning Plan，To further clarify the responsibilities and tasks of teachers and apprentices，So that not only the job skills of new students can be improved as soon as possible.，It also cultivates and shapes their conscientious and responsible spirit of dedication.、Continuous pursuit of perfection and the ultimate work attitude。Complicated geological environment，TBMSerious rock burst occurred in the process of excavation.。Surrounding rock with seemingly smooth and complete surface，In the continuous sound of explosion, it falls in pieces or blocks.。“That's terrible，It's a good thing it's supported.。”Han Yongfu told the author，Such a violent rock burst.，Fortunately, it is adoptedTBMTunneling，Strengthening support was carried out in advance.，If manual drilling and blasting is adopted，The collapsed part has no solid support.，It was a disaster for his workmates.。TBMThe service team has also demonstrated a high degree of innovation in the process of solving difficulties.。For example，In the face of complex geological structures，The team prepared the geological prediction profile report.，Accurate construction is provided“Road map”；This paper aims at the problem of shutdown caused by stacking belt due to crushing surrounding rock.，Slag-separating plate is added in the cutter head，The problem of instantaneous increase of slag amount is solved while avoiding the entry of overlarge stones.。For“People、Machine、Thing、Ring、Tube”Aspects of the problem，UpgradedTBMIntelligent Support System and Operation System，The fixed machine is innovated、Fixed post、Assign responsibility、Quantitative“Four fixed management methods”，The efficiency of single-post operation has been doubled.。This is highly responsible for the quality of the project，It is the true portrayal of CCCC Tianhe Project Service Team.。
The construction of Tianshan Shengli Tunnel“TBMMiddle pilot tunnel+Main hole drilling and blasting method”Combined process，Make use ofTBMAdvantages of rapid tunneling，Opening up an auxiliary working face for the double main tunnel，Realization“Long tunnel super bunt”，The simultaneous operation of six working faces in the main tunnel can be realized during the peak period，The construction period can be shortened to 52 months.。The company will also maintain continuous technological innovation.，Continuous improvementTBMPotential of tunneling efficiency，With more new records.、New Achievements Promote High Quality Development of Enterprises，Let ZhongjiaoTBMEfficient tunneling, this one.“Business card”It's getting brighter and brighter all over the world.！
